Falsifiability means that the hypothesis matches reality. It is possible to create a marvelous hypothesis which has nothing to do with the real life.
That is actually quite common and popular. Let’s postulate that whether is determined by the holy spirits. Rain dance works in some occasions. Sometimes more human sacrifice is required. It sounds plausible and 97% of experts will support it. How can you deny it? Is it enough that randomized double blind test does not pass.